Secure 33 Series™ 5mm NMR Tubes

The Secure 33 Series™ NMR tubes are made from ASTM Type I Class A borosilicate glass (“low expansion” borosilicate glass such as Corning Pyrex® 7740 or equivalent) and match the properties of the Select Series™ NMR tubes from Norell. Because of the low coefficient of thermal expansion, Secure 33 Series™ NMR tubes show a high degree of thermal shock resistance, a necessary attribute to prevent breakage when large temperature variations are expected in variable temperature studies, degassing samples through freeze-pump-thaw cycles, etc.